import pytest

from web.email_service import (
    EmailConfigurationError,
    send_email,
)


def test_send_email_disabled(monkeypatch):
    called = {}

    def _fake_smtp(*args, **kwargs):  # pragma: no cover - should not be called
        called["used"] = True
        raise AssertionError(
            "SMTP should not be invoked when email is disabled")

    monkeypatch.setattr("web.email_service.smtplib.SMTP", _fake_smtp)
    monkeypatch.setattr("web.email_service.smtplib.SMTP_SSL", _fake_smtp)

    result = send_email(
        subject="Hi",
        body="Test",
        to="user@example.com",
        settings={"enabled": False},
    )
    assert result is False
    assert called == {}


def test_send_email_sends_message(monkeypatch):
    events = {"starttls": False, "login": None, "sent": None}

    class FakeSMTP:
        def __init__(self, *, host, port, timeout):
            self.host = host
            self.port = port
            self.timeout = timeout

        def __enter__(self):
            return self

        def __exit__(self, exc_type, exc, tb):
            return False

        def ehlo(self):
            events.setdefault("ehlo", 0)
            events["ehlo"] += 1

        def starttls(self):
            events["starttls"] = True

        def login(self, username, password):
            events["login"] = (username, password)

        def send_message(self, message, *, from_addr, to_addrs):
            events["sent"] = {
                "from": from_addr,
                "to": tuple(to_addrs),
                "subject": message["Subject"],
            }

    monkeypatch.setattr("web.email_service.smtplib.SMTP", FakeSMTP)
    monkeypatch.setattr("web.email_service.smtplib.SMTP_SSL", FakeSMTP)

    settings = {
        "enabled": True,
        "from_address": "jobs@example.com",
        "smtp": {
            "host": "smtp.example.com",
            "port": 2525,
            "timeout": 15,
            "username": "jobs",
            "password": "secret",
            "use_tls": True,
            "use_ssl": False,
        },
    }

    result = send_email(
        subject="New Jobs",
        body="You have new jobs waiting.",
        to=["a@example.com", "b@example.com"],
        cc="c@example.com",
        bcc=["d@example.com"],
        settings=settings,
    )

    assert result is True
    assert events["starttls"] is True
    assert events["login"] == ("jobs", "secret")
    assert events["sent"] == {
        "from": "jobs@example.com",
        "to": ("a@example.com", "b@example.com", "c@example.com", "d@example.com"),
        "subject": "New Jobs",
    }


def test_send_email_requires_host():
    settings = {
        "enabled": True,
        "from_address": "jobs@example.com",
        "smtp": {"host": "", "port": 587},
    }
    with pytest.raises(EmailConfigurationError):
        send_email(subject="Hi", body="Test",
                   to="user@example.com", settings=settings)